In-orbit Failure Analysis and Verification for Thermistors outside Satellites

3rd International Conference on Aeronautical Materials and Aerospace Engineering

航空航天工程

Zhang, Bin^1^2 ; D., Wang ; Y., Fan ; L., Liu ; P., Zhao

Beijing Institute of Spacecraft Environment Engineering, Beijing

100094, China^1

Assembly Processing Technology Center for Aerospace Product of CASC, Beijing

100094, China^2

Beijing Institute of Spacecraft System Engineering, Beijing

100094, China^3

关键词: Analysis and verifications;    Failure events;    Fault-trees;    In-orbit;    Life-times;    On board equipments;    Thermal control;    Thermal resistor;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/608/1/012036/pdf
DOI  :  10.1088/1757-899X/608/1/012036

学科分类：航空航天科学

来源: IOP

【 摘 要 】

Satellite thermistor is used to measure the in-orbit temperature to support thermal control so that the on-board equipment can work in the appropriate temperature to get higer reliability and more life-time. In recent years, there have been several in-orbit failure events of thermistors outside the satellite, which have brought troubles to the thermal control of the whole satellite. In this paper, failure modes of in-orbit thermal resistors outside cabin are analyzed by fault tree, and ground simulation experiment is carried out by high-low temperature impact test. Fault cause is given according to test result and analysis.